2. The block (A) has a mass of 10 kg and the coefficient of dynamic friction between the block and the ground is μ = 0.3. Block B has a mass of 15 kg and slides down a frictionless pole. If the blocks start from at x=0 calculate: a. The distance block A moves after block B has fallen 4 m b. The relationship between the speed of A and the speed of B c. The work done by friction on block A d. The velocity of block B. B 2m A

Block A has a mass of 10 kg and bloc B has a mass of 2 Kg and are kept at rest. The 2 blocs are comected by a cord passing by a wheel at the top of the incline. The surface of the incline has a friction coefficient -0.12. The angle of the incline is 0= 30°. A is at 6 meters above the incline floor. After being released from rest, the bloc A will move down. Determine the total energy of the bloc A after it has moved down the incline by 4 meters.. Calculate its velocity. 6 m B

The 10-lb block has a speed of 4 ft/s when the force of F = (8t²) lb is applied. The coefficient of kinetic friction at the surface is μ = 0.2. (Figure 1) Figure F = (81²) lb v = 4 ft/s 1 of 1 > Part A Determine the speed of the block when it moves s = 30 ft. Express your answer to three significant figures and include the appropriate units. V = Submit 0 O μA Value Provide Feedback Request Answer Units ? Next >

A 250 lb block A is released from rest. It pulls the 400 lb block B up the 30 ramp. The kinetic friction coefficient between block B and the ramp is 0.5. Determine the tension in the cable and the accelerations of block A and block B (or point C).

Block A has a mass of 55 kg, and block B has a mass of 11 kg. The coefficients of friction between all surfaces of contac are µs= 0.20 and Hk= 0.15. 25° If P= 0, determine the acceleration of block B. (You must provide an answer before moving on to the next part.) The acceleration of block B is m/s $ 25°.

Question: The 250-kg crate rests on the ground for which the coefficients of static and kinetic friction are μs = 0.5 and μk = 0.4, respectively. The winch delivers a horizontal towing force T to its cable at A which varies as shown in the graph. Originally the tension in the cable is zero Part A) Determine the speed of the crate when t = 3.9 s. Hint: First determine the force needed to begin moving the crate. Express your answer to three significant figures and include the appropriate units.

The 2.5-Mg van is traveling with a speed of 137 km/h when the brakes are applied and all four wheels lock. (Figure 1) Part A If the speed decreases to 54 km/h in 5 s, determine the coefficient of kinetic friction between the tires and the road. Figure < 1 of 1 Express your answer using three significant figures. Vo AEo| It vec Pk =

2. A block travels past point A with a speed of 8 m/s along a smooth surface until it reaches a rough surface of length L=20 m and a coefficient of kinetic friction of 0.8. If the height h₁ = 8 m, and h₂ = 3 m. Determine (A) the speed of the block at point B (B) whether the speed at point C (C) reaches point D. If so, what is the speed at point D, if not, how far is the rough surface that cross the beam?

The 152 kg block shown starts with a velocity of 3.00 m/s downward from position A and slides down the incline plane to position B. The coefficient of friction between the block and the plane is u = 0.15. What is the velocity of the block at position B? Note: answer to be in meters/second (m/s). 20 m 152 kg H = 0.15 12 A B